1) Plain 
• (n.) An open level tract of country; especially `Campagna di Roma.` The extensive undulating plain which surrounds Rome.
Cam·pa'gna (cȧm*pä'nyȧ) noun [ Italian See Campaigg .] An open level tract of country; especially ' Campagna di Roma.' The extensive undulating plain which surrounds Rome. » Its length is commonly stated to be about ninety miles, and its breadth from twenty-seven to for...